linux-kernel - Re: [PATCH] scsi: ufs: add missing host_lock in setup_xfer

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Message-ID: <cb928bc9-0124-f082-8b5a-584afd9f1d66@acm.org>
Date:   Thu, 1 Jul 2021 08:23:13 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org
Cc:     Stanley Chu <stanley.chu@...iatek.com>,
        Can Guo <cang@...eaurora.org>, Bean Huo <beanhuo@...ron.com>,
        Asutosh Das <asutoshd@...eaurora.org>
Subject: Re: [PATCH] scsi: ufs: add missing host_lock in setup_xfer_req

On 6/30/21 5:51 PM, Jaegeuk Kim wrote:
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> index c98d540ac044..194755c9ddfe 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -1229,8 +1229,13 @@ static inline int ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
>  static inline void ufshcd_vops_setup_xfer_req(struct ufs_hba *hba, int tag,
>  					bool is_scsi_cmd)
>  {
> -	if (hba->vops && hba->vops->setup_xfer_req)
> -		return hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
> +	if (hba->vops && hba->vops->setup_xfer_req) {
> +		unsigned long flags;
> +
> +		spin_lock_irqsave(hba->host->host_lock, flags);
> +		hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
> +		spin_unlock_irqrestore(hba->host->host_lock, flags);
> +	}
>  }

Since this function has only one caller, how about moving it into ufshcd.c?

Thanks,

Bart.